TY - JOUR
T1 - Therapeutic efficacy of combined PEGylated liposomal doxorubicin and radiofrequency ablation
T2 - Comparing single and combined therapy in young and old mice
AU - Andriyanov, Alexander V.
AU - Portnoy, Emma
AU - Koren, Erez
AU - Semenenko, Inesa
AU - Eyal, Sara
AU - Goldberg, S. Nahum
AU - Barenholz, Yechezkel
N1 - Publisher Copyright:
© 2017
PY - 2017/7/10
Y1 - 2017/7/10
N2 - Antitumor therapy in the elderly is particularly challenging due to multiple, often chronic diseases, poly-therapy, and age-related physiological changes that affect drug efficacy and safety. Furthermore, tumors may become more aggressive and drug-resistant with advanced age, leading to poor patient prognosis. In this study, we evaluated in mice bearing medulloblastoma xenografts the effect of age on tumor progression and tumor therapy. We focused on therapeutic efficacy of two treatment modalities alone radiofrequency ablation therapy (RFA), PEGylated liposomal doxorubicin (PLD) equivalent to Doxil, and their combination. We demonstrated that tumor growth rate was higher and survival was lower in old versus young mice (p < 0.05). Likewise, tumors in old mice were less susceptible to either PLD or RFA monotherapy. However, combined therapy of PLD and RFA succeeded to eliminate the age-related differences in anti-cancer treatment efficacy (p > 0.05) by the two monotherapies. The results on PLD therapy are supported by preferable PEGylated nano-liposomes accumulation in tumors of young mice compared to old mice, as determined by near-infrared imaging with indocyanine green (ICG)-labeled PEGylated nano-liposomes. Taken together, our findings suggest that age effects on tumor progression and tumor monotherapy outcome may potentially be related to changes in tumor microenvironment, and that these changes can be overcome by RFA as this technique abolishes these differences and significantly improves success of PLD treatment.
AB - Antitumor therapy in the elderly is particularly challenging due to multiple, often chronic diseases, poly-therapy, and age-related physiological changes that affect drug efficacy and safety. Furthermore, tumors may become more aggressive and drug-resistant with advanced age, leading to poor patient prognosis. In this study, we evaluated in mice bearing medulloblastoma xenografts the effect of age on tumor progression and tumor therapy. We focused on therapeutic efficacy of two treatment modalities alone radiofrequency ablation therapy (RFA), PEGylated liposomal doxorubicin (PLD) equivalent to Doxil, and their combination. We demonstrated that tumor growth rate was higher and survival was lower in old versus young mice (p < 0.05). Likewise, tumors in old mice were less susceptible to either PLD or RFA monotherapy. However, combined therapy of PLD and RFA succeeded to eliminate the age-related differences in anti-cancer treatment efficacy (p > 0.05) by the two monotherapies. The results on PLD therapy are supported by preferable PEGylated nano-liposomes accumulation in tumors of young mice compared to old mice, as determined by near-infrared imaging with indocyanine green (ICG)-labeled PEGylated nano-liposomes. Taken together, our findings suggest that age effects on tumor progression and tumor monotherapy outcome may potentially be related to changes in tumor microenvironment, and that these changes can be overcome by RFA as this technique abolishes these differences and significantly improves success of PLD treatment.
KW - Cancer
KW - Doxil
KW - Indocyanine green
KW - Liposomes
KW - Radiofrequency ablation
UR - http://www.scopus.com/inward/record.url?scp=85016482288&partnerID=8YFLogxK
U2 - 10.1016/j.jconrel.2017.02.018
DO - 10.1016/j.jconrel.2017.02.018
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C2 - 28215670
AN - SCOPUS:85016482288
SN - 0168-3659
VL - 257
SP - 2
EP - 9
JO - Journal of Controlled Release
JF - Journal of Controlled Release
ER -